I'm hoping to modernize my E53 by adding this and supporting MP3 playback and hands-free phone use. I've come across mixed reviews for this particular unit, so I thought I'd ask on here and see what the consensus is before dropping a few hundred bucks on it.

Thanks in advance!

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E38 740i (9/94, GF61, JPN: M60B40, ZF 5HP30, 3.15:1)
E53 X5 4.4i (5/06, FB53, US: N62B44, ZF GA6HP26Z, 3.46:1)